Roundtown Mercedes of Maryscot
| Other name(s) | Sadie |
|---|---|
| Species | Canis lupus familiaris |
| Breed | Scottish Terrier |
| Sex | Female |
| Born | 2 April 2005 Mackinac Island, Michigan |
| Died | 13 August 2014 (aged 9) California |
| Occupation | Show dog |
| Title | Best in Show at the Westminster Kennel Club Dog Show |
| Term | 2010 |
| Predecessor | Ch. Clussexx Three D Grinchy Glee (Sussex Spaniel) |
| Successor | GCH Foxcliffe Hickory Wind (Scottish Deerhound) |
| Owner | Amelia and Dan Musser |
| Parent(s) | Ch. Anstamm Like A Rock (father) Ch. Maryscot Painted Black (mother) |
GCH Roundtown Mercedes of Maryscot (2 April 2005 - 13 August 2014), also known as Sadie, was a Scottish terrier from Mackinac Island in the U.S. state of Michigan.